HESI Pediatrics Review – Real Practice Questions, Answers & Detailed
Rationales (Updated 2026) | Growth & Development Milestones, Pediatric
Assessment & Vital Signs, Childhood Diseases & Infections, Pediatric
Pharmacology, Respiratory & Cardiac Disorders, Immunizations & Safety,
Family-Centered Care, NCLEX-Style Clinical Judgment & HESI Pediatrics
Success
Question 1: A nurse is assessing a 6-month-old infant during a well-child visit.
Which developmental milestone should the nurse expect this infant to
demonstrate?
A. Walking independently
B. Saying two-word phrases
C. Rolling from back to front
D. Building a tower of three blocks
CORRECT ANSWER: C. Rolling from back to front
Rationale: At 6 months of age, infants typically achieve the gross motor milestone of
rolling from back to front. Walking independently occurs around 12-15 months, saying
two-word phrases emerges around 18-24 months, and building a tower of blocks
develops during the toddler period (18-24 months). Recognizing age-appropriate
milestones is essential for identifying potential developmental delays in pediatric
nursing practice.
Question 2: A pediatric nurse is preparing to administer an intramuscular injection
to a 4-month-old infant. Which site is considered the safest and most appropriate
for this procedure?
A. Deltoid muscle
B. Ventrogluteal muscle
C. Vastus lateralis muscle
D. Dorsogluteal muscle
CORRECT ANSWER: C. Vastus lateralis muscle
Rationale: The vastus lateralis muscle is the preferred site for intramuscular injections
in infants under 12 months of age because it is well-developed at birth, free from major
nerves and blood vessels, and easily accessible. The deltoid is not sufficiently
developed in infants, the ventrogluteal requires precise landmark identification that is
challenging in infants, and the dorsogluteal poses risk of sciatic nerve injury and is
contraindicated in young children.
Question 3: A 2-year-old child is admitted to the pediatric unit with bronchiolitis
caused by respiratory syncytial virus (RSV). Which nursing intervention should be
prioritized to support the child's respiratory status?
A. Administering a bronchodilator via nebulizer every 4 hours
B. Positioning the child in a semi-Fowler's position with head elevated
,C. Encouraging oral fluid intake of at least 100 mL per hour
D. Applying cool mist humidification to the child's room
CORRECT ANSWER: B. Positioning the child in a semi-Fowler's position with head
elevated
Rationale: Positioning the child with the head elevated optimizes lung expansion,
reduces work of breathing, and promotes drainage of secretions, which is critical in
managing bronchiolitis. While bronchodilators may be prescribed, their efficacy in RSV
bronchiolitis is limited and not universally recommended. Fluid intake is important but
should be carefully monitored to avoid fluid overload in respiratory distress.
Humidification may provide comfort but does not take priority over positioning for
airway management.
Question 4: A nurse is calculating a medication dose for a pediatric patient who
weighs 33 pounds. The prescribed dose is 10 mg/kg/day divided into two equal
doses. How many milligrams should the nurse administer per dose?
A. 75 mg
B. 150 mg
C. 37.5 mg
D. 16.5 mg
CORRECT ANSWER: A. 75 mg
Rationale: First, convert pounds to kilograms: 33 lbs ÷ 2.2 = 15 kg. Next, calculate the
total daily dose: 15 kg × 10 mg/kg = 150 mg/day. Finally, divide by two for each dose: 150
mg ÷ 2 = 75 mg per dose. Accurate weight-based calculations are critical in pediatric
pharmacology to prevent underdosing or toxicity, and nurses must always verify
conversions and calculations before administration.
Question 5: A parent asks the nurse when their infant should receive the first dose
of the measles, mumps, and rubella (MMR) vaccine. According to the
recommended childhood immunization schedule, what is the appropriate age for
initial MMR administration?
A. 2 months
B. 6 months
C. 12 to 15 months
D. 4 to 6 years
CORRECT ANSWER: C. 12 to 15 months
Rationale: The CDC recommends the first dose of the MMR vaccine be administered
between 12 and 15 months of age, with a second dose given between 4 and 6 years.
Administering MMR before 12 months may result in reduced immunogenicity due to
interference from maternal antibodies. Understanding the routine immunization
schedule is essential for pediatric nurses to provide accurate family education and
ensure timely vaccine administration.
,Question 6: A 9-month-old infant is being evaluated for possible failure to thrive.
Which assessment finding would most strongly support this diagnosis?
A. Weight at the 10th percentile for age
B. Head circumference crossing two percentile lines downward
C. Length at the 25th percentile with stable growth trajectory
D. Weight-for-length ratio below the 5th percentile
CORRECT ANSWER: D. Weight-for-length ratio below the 5th percentile
Rationale: Failure to thrive is best identified by a weight-for-length or weight-for-height
measurement below the 5th percentile, indicating acute malnutrition or inadequate
caloric intake relative to growth needs. While crossing percentile lines may warrant
monitoring, the weight-for-length ratio is the most sensitive indicator of current
nutritional status in infants. Head circumference changes may indicate neurological
concerns but are not specific to failure to thrive.
Question 7: A pediatric nurse is caring for a child with type 1 diabetes mellitus who
is experiencing signs of hypoglycemia. Which assessment finding should the nurse
recognize as an early manifestation of low blood glucose?
A. Kussmaul respirations
B. Fruity breath odor
C. Diaphoresis and tremors
D. Decreased level of consciousness
CORRECT ANSWER: C. Diaphoresis and tremors
Rationale: Diaphoresis, tremors, irritability, and hunger are early autonomic symptoms
of hypoglycemia resulting from catecholamine release. Kussmaul respirations and fruity
breath odor are signs of diabetic ketoacidosis (hyperglycemia), while decreased
consciousness represents a late, severe manifestation of hypoglycemia requiring
immediate intervention. Early recognition of hypoglycemic symptoms enables prompt
treatment to prevent neurological compromise.
Question 8: A nurse is providing discharge teaching to the parents of a 3-year-old
child diagnosed with otitis media. Which statement by the parents indicates
understanding of appropriate home management?
A. "We will give the prescribed antibiotic until the ear pain resolves."
B. "We should apply a warm compress to the affected ear for comfort."
C. "We can use over-the-counter cough suppressants to reduce ear pressure."
D. "We will schedule a follow-up hearing test in 6 months regardless of symptoms."
CORRECT ANSWER: B. "We should apply a warm compress to the affected ear for
comfort."
Rationale: Warm compresses provide symptomatic relief for ear pain associated with
otitis media. Antibiotics must be completed for the full prescribed duration regardless
, of symptom resolution to prevent resistance and recurrence. Cough suppressants are
not indicated for otitis media and may cause adverse effects in young children. Routine
hearing tests are not required unless persistent effusion or speech delays are noted.
Question 9: A pediatric nurse is assessing a 4-year-old child admitted with
suspected appendicitis. Which clinical finding is most characteristic of this
condition in preschool-aged children?
A. Periumbilical pain that migrates to the right lower quadrant
B. High-grade fever preceding abdominal pain
C. Profuse diarrhea with mucus
D. Generalized abdominal rigidity without localization
CORRECT ANSWER: A. Periumbilical pain that migrates to the right lower quadrant
Rationale: Classic appendicitis presentation includes initial vague periumbilical pain
that later localizes to McBurney's point in the right lower quadrant as inflammation
progresses. Fever typically follows pain onset rather than preceding it. Diarrhea is
uncommon and may suggest gastroenteritis. While rigidity may occur, localized
tenderness and migration of pain are more specific indicators for appendicitis in
children.
Question 10: A nurse is planning care for a hospitalized 18-month-old toddler.
Which intervention best supports the child's developmental needs according to
Erikson's theory of psychosocial development?
A. Providing a consistent schedule for meals and naps
B. Allowing the child to make simple choices, such as which cup to use
C. Encouraging the child to play cooperatively with other hospitalized children
D. Using detailed explanations to prepare the child for procedures
CORRECT ANSWER: B. Allowing the child to make simple choices, such as which
cup to use
Rationale: According to Erikson, toddlers (1-3 years) are in the autonomy versus shame
and doubt stage, where fostering independence through appropriate choices supports
healthy development. While routines provide security, offering simple choices directly
addresses the developmental task of autonomy. Cooperative play emerges in the
preschool period, and detailed explanations exceed the cognitive capacity of an 18-
month-old, who benefits more from brief, concrete preparation.
Question 11: A 7-year-old child with asthma is prescribed albuterol via metered-
dose inhaler with a spacer. Which instruction should the nurse include when
teaching the child and parents about proper technique?
A. Inhale rapidly and deeply immediately after actuating the inhaler
B. Hold breath for 10 seconds after inhaling the medication
C. Rinse the mouth with water only after using the corticosteroid inhaler
D. Use the rescue inhaler before the corticosteroid inhaler if both are prescribed
Rationales (Updated 2026) | Growth & Development Milestones, Pediatric
Assessment & Vital Signs, Childhood Diseases & Infections, Pediatric
Pharmacology, Respiratory & Cardiac Disorders, Immunizations & Safety,
Family-Centered Care, NCLEX-Style Clinical Judgment & HESI Pediatrics
Success
Question 1: A nurse is assessing a 6-month-old infant during a well-child visit.
Which developmental milestone should the nurse expect this infant to
demonstrate?
A. Walking independently
B. Saying two-word phrases
C. Rolling from back to front
D. Building a tower of three blocks
CORRECT ANSWER: C. Rolling from back to front
Rationale: At 6 months of age, infants typically achieve the gross motor milestone of
rolling from back to front. Walking independently occurs around 12-15 months, saying
two-word phrases emerges around 18-24 months, and building a tower of blocks
develops during the toddler period (18-24 months). Recognizing age-appropriate
milestones is essential for identifying potential developmental delays in pediatric
nursing practice.
Question 2: A pediatric nurse is preparing to administer an intramuscular injection
to a 4-month-old infant. Which site is considered the safest and most appropriate
for this procedure?
A. Deltoid muscle
B. Ventrogluteal muscle
C. Vastus lateralis muscle
D. Dorsogluteal muscle
CORRECT ANSWER: C. Vastus lateralis muscle
Rationale: The vastus lateralis muscle is the preferred site for intramuscular injections
in infants under 12 months of age because it is well-developed at birth, free from major
nerves and blood vessels, and easily accessible. The deltoid is not sufficiently
developed in infants, the ventrogluteal requires precise landmark identification that is
challenging in infants, and the dorsogluteal poses risk of sciatic nerve injury and is
contraindicated in young children.
Question 3: A 2-year-old child is admitted to the pediatric unit with bronchiolitis
caused by respiratory syncytial virus (RSV). Which nursing intervention should be
prioritized to support the child's respiratory status?
A. Administering a bronchodilator via nebulizer every 4 hours
B. Positioning the child in a semi-Fowler's position with head elevated
,C. Encouraging oral fluid intake of at least 100 mL per hour
D. Applying cool mist humidification to the child's room
CORRECT ANSWER: B. Positioning the child in a semi-Fowler's position with head
elevated
Rationale: Positioning the child with the head elevated optimizes lung expansion,
reduces work of breathing, and promotes drainage of secretions, which is critical in
managing bronchiolitis. While bronchodilators may be prescribed, their efficacy in RSV
bronchiolitis is limited and not universally recommended. Fluid intake is important but
should be carefully monitored to avoid fluid overload in respiratory distress.
Humidification may provide comfort but does not take priority over positioning for
airway management.
Question 4: A nurse is calculating a medication dose for a pediatric patient who
weighs 33 pounds. The prescribed dose is 10 mg/kg/day divided into two equal
doses. How many milligrams should the nurse administer per dose?
A. 75 mg
B. 150 mg
C. 37.5 mg
D. 16.5 mg
CORRECT ANSWER: A. 75 mg
Rationale: First, convert pounds to kilograms: 33 lbs ÷ 2.2 = 15 kg. Next, calculate the
total daily dose: 15 kg × 10 mg/kg = 150 mg/day. Finally, divide by two for each dose: 150
mg ÷ 2 = 75 mg per dose. Accurate weight-based calculations are critical in pediatric
pharmacology to prevent underdosing or toxicity, and nurses must always verify
conversions and calculations before administration.
Question 5: A parent asks the nurse when their infant should receive the first dose
of the measles, mumps, and rubella (MMR) vaccine. According to the
recommended childhood immunization schedule, what is the appropriate age for
initial MMR administration?
A. 2 months
B. 6 months
C. 12 to 15 months
D. 4 to 6 years
CORRECT ANSWER: C. 12 to 15 months
Rationale: The CDC recommends the first dose of the MMR vaccine be administered
between 12 and 15 months of age, with a second dose given between 4 and 6 years.
Administering MMR before 12 months may result in reduced immunogenicity due to
interference from maternal antibodies. Understanding the routine immunization
schedule is essential for pediatric nurses to provide accurate family education and
ensure timely vaccine administration.
,Question 6: A 9-month-old infant is being evaluated for possible failure to thrive.
Which assessment finding would most strongly support this diagnosis?
A. Weight at the 10th percentile for age
B. Head circumference crossing two percentile lines downward
C. Length at the 25th percentile with stable growth trajectory
D. Weight-for-length ratio below the 5th percentile
CORRECT ANSWER: D. Weight-for-length ratio below the 5th percentile
Rationale: Failure to thrive is best identified by a weight-for-length or weight-for-height
measurement below the 5th percentile, indicating acute malnutrition or inadequate
caloric intake relative to growth needs. While crossing percentile lines may warrant
monitoring, the weight-for-length ratio is the most sensitive indicator of current
nutritional status in infants. Head circumference changes may indicate neurological
concerns but are not specific to failure to thrive.
Question 7: A pediatric nurse is caring for a child with type 1 diabetes mellitus who
is experiencing signs of hypoglycemia. Which assessment finding should the nurse
recognize as an early manifestation of low blood glucose?
A. Kussmaul respirations
B. Fruity breath odor
C. Diaphoresis and tremors
D. Decreased level of consciousness
CORRECT ANSWER: C. Diaphoresis and tremors
Rationale: Diaphoresis, tremors, irritability, and hunger are early autonomic symptoms
of hypoglycemia resulting from catecholamine release. Kussmaul respirations and fruity
breath odor are signs of diabetic ketoacidosis (hyperglycemia), while decreased
consciousness represents a late, severe manifestation of hypoglycemia requiring
immediate intervention. Early recognition of hypoglycemic symptoms enables prompt
treatment to prevent neurological compromise.
Question 8: A nurse is providing discharge teaching to the parents of a 3-year-old
child diagnosed with otitis media. Which statement by the parents indicates
understanding of appropriate home management?
A. "We will give the prescribed antibiotic until the ear pain resolves."
B. "We should apply a warm compress to the affected ear for comfort."
C. "We can use over-the-counter cough suppressants to reduce ear pressure."
D. "We will schedule a follow-up hearing test in 6 months regardless of symptoms."
CORRECT ANSWER: B. "We should apply a warm compress to the affected ear for
comfort."
Rationale: Warm compresses provide symptomatic relief for ear pain associated with
otitis media. Antibiotics must be completed for the full prescribed duration regardless
, of symptom resolution to prevent resistance and recurrence. Cough suppressants are
not indicated for otitis media and may cause adverse effects in young children. Routine
hearing tests are not required unless persistent effusion or speech delays are noted.
Question 9: A pediatric nurse is assessing a 4-year-old child admitted with
suspected appendicitis. Which clinical finding is most characteristic of this
condition in preschool-aged children?
A. Periumbilical pain that migrates to the right lower quadrant
B. High-grade fever preceding abdominal pain
C. Profuse diarrhea with mucus
D. Generalized abdominal rigidity without localization
CORRECT ANSWER: A. Periumbilical pain that migrates to the right lower quadrant
Rationale: Classic appendicitis presentation includes initial vague periumbilical pain
that later localizes to McBurney's point in the right lower quadrant as inflammation
progresses. Fever typically follows pain onset rather than preceding it. Diarrhea is
uncommon and may suggest gastroenteritis. While rigidity may occur, localized
tenderness and migration of pain are more specific indicators for appendicitis in
children.
Question 10: A nurse is planning care for a hospitalized 18-month-old toddler.
Which intervention best supports the child's developmental needs according to
Erikson's theory of psychosocial development?
A. Providing a consistent schedule for meals and naps
B. Allowing the child to make simple choices, such as which cup to use
C. Encouraging the child to play cooperatively with other hospitalized children
D. Using detailed explanations to prepare the child for procedures
CORRECT ANSWER: B. Allowing the child to make simple choices, such as which
cup to use
Rationale: According to Erikson, toddlers (1-3 years) are in the autonomy versus shame
and doubt stage, where fostering independence through appropriate choices supports
healthy development. While routines provide security, offering simple choices directly
addresses the developmental task of autonomy. Cooperative play emerges in the
preschool period, and detailed explanations exceed the cognitive capacity of an 18-
month-old, who benefits more from brief, concrete preparation.
Question 11: A 7-year-old child with asthma is prescribed albuterol via metered-
dose inhaler with a spacer. Which instruction should the nurse include when
teaching the child and parents about proper technique?
A. Inhale rapidly and deeply immediately after actuating the inhaler
B. Hold breath for 10 seconds after inhaling the medication
C. Rinse the mouth with water only after using the corticosteroid inhaler
D. Use the rescue inhaler before the corticosteroid inhaler if both are prescribed
